This is a gift box mechanism designed to startle anyone who tries to pick it up!
Uses 1 X AA Battery
The fancy packaging is just a disguise to trick people into reaching for it. Why It Buzzes
The Hidden Sensor: There is usually a spring-loaded pressure switch hidden directly beneath the pen inside the box. The Electric Circuit: When the pen is covering the sensor, the circuit is open. As soon as you lift the pen, the spring pops up, completing the circuit.